Life History Features of the Invasive Snail Physa acuta Occurring in Kolkata, India
- 30 Downloads
The life history features of the invasive snail Physa acuta occurring in Kolkata was assessed emphasizing the growth and the life table parameters. The growth observed in terms of the weekly changes in the shell length and body weight for a cohort complied with the von Bertalanffy growth equations (for shell length: Lt = 13.651 * (1 − exp(−0.161(t−0.55)) and for body weight Wt = 86.30 * (1 − exp(−0.161(t−0.55))1.811. The generation time (Tc), the net reproductive rate (R0), the intrinsic rate of natural increase (rm) and the finite rate of increase (λ), were respectively, 47.36 days, 644.64, 0.13 and 1.14, which are comparable to the findings made on the P. acuta in other parts of the world. Variations in the life history of P. acuta may be possible if considered over the newly invaded habitats in West Bengal, India. Although the snails are restricted to the sewage drain habitats, in Kolkata, India, the results are indicative of the prospective invasion of the snails to other freshwater habitats, if appropriate measures to control the population are not adopted.
KeywordsPhysa acuta Invasive snail von Bertalanffy growth equation
The authors are grateful to the respective Heads Department of Zoology, The University of Burdwan, Burdwan, and University of Calcutta, Kolkata, for the facilities provided in carrying out the work. The financial assistance to CS, through the RGNF fellowship, UGC, sanction no. F1-17.1/2012/RGNF-2012-13-SC-WES-24762/(SA-III/website) 28th Feb. 2013 and to SP through MANF, UGC, sanction no. F1-17.1/2013-14/MANF-2013-14-MUS-WES-20114/(SA-III/Website) dt. 06 Feb-2014 is duly acknowledged.
Conflict of interest
The authors declare that they have no conflict of interest.
- 3.Ali JH (1993) The distribution of Physa acuta Draparnaud (Gastropoda: Physidae) in Malaysia and its suitability as test material for insecticide toxicity studies. J Med Appl Malacol 5:129–134Google Scholar
- 4.Raut SK, Bhaumik S, Das S (1995) Occurrence of the snail Physa acuta Draparnaud in Calcutta, India. J Bom Nat His Soc 92:434Google Scholar
- 5.Aditya G, Raut SK (2002) Potential of the leech Glossiphonia weberi (Blanchard) in controlling the sewage snails Physa acuta Draparnaud. Curr Sci 83(11):1317–1319Google Scholar
- 9.Raut SK, Misra TK (1993) Influence of salinity on the breeding of three medically important freshwater snail species (Gastropoda: Basommatophora: Lymnaeidae et Planorbidae). Malakol Abh Mus Tierkd Dresden 16:173–176Google Scholar
- 10.Zar JH (1999) Biostatistical analysis, IV edn. Pearson Education Singapore Pte. Ltd., New DelhiGoogle Scholar
- 11.Krebs CJ (1999) Ecological Methodology, II edn. Benjamin Cummings, New YorkGoogle Scholar
- 14.de Kock KN, Wolmarans CT (2007) Distribution and habitats of the alien invader freshwater snail Physa acuta in South Africa. Water SA 33:717–722Google Scholar
- 16.Guo Y, Hwang C-C, He H (2009) Expansion of an invasive freshwater snail Physa acuta (Gastropoda: Physidae) in China. Molluscan Res 29:174–178Google Scholar
- 18.Devi P, Islam S, Das M (2006) Prevalence of freshwater snails in Assam. J Vet Parasitol 20(1):81–84Google Scholar
- 19.Devi P, Islam S, Das M (2008) Ecology and biology of aquatic snails and their control: I. Comparative biology and development of five freshwater snails from Assam. J Vet Parasitol 22(2):9–12Google Scholar
- 21.Aditya G, Raut SK (2002) Predation of water bug Sphaerodema rusticum on the freshwater snails Lymnaea (Radix) luteola and Physa acuta. Veliger 45(3):267–269Google Scholar
- 22.Aditya G, Raut SK (2001) Food of the snail, Pomacea bridgesi introduced in India. Curr Sci 80:919–921Google Scholar
- 23.Aditya G, Raut SK (2001) Predation of water bug Sphaerodema rusticum Fabricius on the snail Pomacea bridgesi (Reeve), introduced in India. Curr Sci 81:1413–1414Google Scholar
- 27.Saha C, Pramanik S, Chakraborty J, Parveen S, Aditya G (2016) Abundance and body size of the invasive snail Physa acuta occurring in Burdwan, West Bengal, India. J Entomol Zool Stud 4(4):490–497Google Scholar